anotherim/src/main/res/layout/fragment_conversation.xml

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <RelativeLayout xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <ListView
            android:id="@+id/messages_view"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_above="@+id/snackbar"
            android:layout_alignParentStart="true"
            android:layout_alignParentTop="true"
            android:divider="@null"
            android:dividerHeight="0dp"
            android:listSelector="@android:color/transparent"
            android:stackFromBottom="true"
            android:transcriptMode="normal"
            tools:listitem="@layout/item_message_sent" />

        <com.google.android.material.floatingactionbutton.FloatingActionButton
            android:id="@+id/scroll_to_bottom_button"
            style="?attr/floatingActionButtonSmallSurfaceStyle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignBottom="@+id/messages_view"
            android:layout_alignParentEnd="true"
            android:src="@drawable/ic_keyboard_double_arrow_down_24dp"
            android:visibility="visible"
            app:useCompatPadding="true" />

        <eu.siacs.conversations.ui.widget.UnreadCountCustomView
            android:id="@+id/unread_count_custom_view"
            android:layout_width="18sp"
            android:layout_height="18sp"
            android:layout_alignTop="@+id/scroll_to_bottom_button"
            android:layout_alignEnd="@+id/scroll_to_bottom_button"
            android:layout_marginTop="16dp"
            android:layout_marginEnd="8dp"
            android:elevation="8dp"
            android:visibility="gone"
            app:backgroundColor="?colorTertiaryContainer"
            app:textColor="?colorOnTertiaryContainer"
            tools:ignore="RtlCompat" />

        <RelativeLayout
            android:id="@+id/textsend"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentStart="true"
            android:layout_alignParentBottom="true"
            android:paddingHorizontal="8dp"
            android:paddingVertical="6dp">

            <LinearLayout
                android:id="@+id/input_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentStart="true"
                android:layout_centerVertical="true"
                android:layout_toStartOf="@+id/textSendButton"
                android:background="@drawable/background_message_bubble"
                android:backgroundTint="?colorTertiaryContainer"
                android:orientation="vertical"
                android:paddingHorizontal="16dp"
                android:paddingVertical="8dp">

                <TextView
                    android:id="@+id/text_input_hint"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginBottom="8sp"
                    android:maxLines="1"
                    android:textAppearance="?textAppearanceBodySmall"
                    android:textColor="?colorOnTertiaryContainer"
                    android:visibility="visible"
                    tools:text="@string/private_message_to" />

                <androidx.recyclerview.widget.RecyclerView
                    android:id="@+id/media_preview"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal"
                    android:requiresFadingEdge="horizontal"
                    android:visibility="gone"
                    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
                    tools:listitem="@layout/item_media_preview">

                </androidx.recyclerview.widget.RecyclerView>

                <eu.siacs.conversations.ui.widget.EditMessage
                    android:id="@+id/textinput"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:background="@android:color/transparent"
                    android:ems="10"
                    android:imeOptions="flagNoExtractUi|actionSend"
                    android:inputType="textShortMessage|textMultiLine|textCapSentences"
                    android:maxLines="8"
                    android:minHeight="32dp"
                    android:minLines="1">

                    <requestFocus />
                </eu.siacs.conversations.ui.widget.EditMessage>

            </LinearLayout>

            <com.google.android.material.button.MaterialButton
                android:id="@+id/textSendButton"
                style="?attr/materialIconButtonFilledTonalStyle"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"
                android:layout_centerVertical="true"
                android:layout_marginStart="8dp"
                android:backgroundTint="?colorSurfaceContainerHigh"
                android:contentDescription="@string/send_message"
                app:icon="@drawable/ic_send_24dp"
                app:iconSize="32dp" />
        </RelativeLayout>

        <RelativeLayout
            android:id="@+id/snackbar"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_above="@+id/textsend"
            android:layout_marginLeft="8dp"
            android:layout_marginRight="8dp"
            android:layout_marginBottom="4dp"
            android:background="@drawable/snackbar"
            android:minHeight="48dp"
            android:visibility="visible">

            <TextView
                android:id="@+id/snackbar_message"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentStart="true"
                android:layout_centerVertical="true"
                android:layout_marginStart="24dp"
                android:layout_toStartOf="@+id/snackbar_action"
                android:textColor="?colorOnSurfaceInverse"
                tools:text="@string/conference_kicked" />

            <TextView
                android:id="@+id/snackbar_action"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"
                android:layout_centerVertical="true"
                android:paddingLeft="24dp"
                android:paddingTop="16dp"
                android:paddingRight="24dp"
                android:paddingBottom="16dp"
                android:textAllCaps="true"
                android:textColor="?colorOnSurfaceInverse"
                android:textStyle="bold"
                tools:text="@string/leave" />
        </RelativeLayout>

    </RelativeLayout>
</layout>